生命周期评估（Life Cycle Assessment）简称LCA，起源于1969年美国中西部研究所受可口可乐委托对饮料容器从原材料采掘到废弃物最终处理的全过程进行的跟踪与定量分析。 其定义为针对某种产品、工艺或行业的全生命周期产生的环境排放指标的统计与分析。全生命 ...

For decades, astronomers searching for life beyond humanity's home planet have had a simple strategy: follow the water. Water is the sine qua non of terrestrial life and as thousands of new planets ...

媒体英语会带大家一起学习 BBC 撰稿人在报道世界大事时常用到的单词和短语。 图像来源, Other 图像加注文字, Professor Stephen Hawking has previously said: "I don't think the human race will survive the next thousand years, unless we spread into ...